mirror of
https://github.com/jellyfin/jellyfin.git
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304 lines
10 KiB
C#
304 lines
10 KiB
C#
using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.Logging;
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Threading;
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using System.Threading.Tasks;
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namespace MediaBrowser.Server.Implementations.Persistence
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{
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public class SqliteChapterRepository
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{
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private IDbConnection _connection;
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private readonly ILogger _logger;
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private IDbCommand _deleteChaptersCommand;
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private IDbCommand _saveChapterCommand;
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/// <summary>
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/// Initializes a new instance of the <see cref="SqliteItemRepository" /> class.
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/// </summary>
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/// <param name="connection">The connection.</param>
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/// <param name="logManager">The log manager.</param>
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/// <exception cref="System.ArgumentNullException">appPaths
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/// or
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/// jsonSerializer</exception>
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public SqliteChapterRepository(IDbConnection connection, ILogManager logManager)
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{
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_connection = connection;
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_logger = logManager.GetLogger(GetType().Name);
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}
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/// <summary>
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/// Opens the connection to the database
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/// </summary>
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/// <returns>Task.</returns>
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public void Initialize()
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{
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string[] queries = {
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"create table if not exists chapters (ItemId GUID, ChapterIndex INT, StartPositionTicks BIGINT, Name TEXT, ImagePath TEXT, PRIMARY KEY (ItemId, ChapterIndex))",
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"create index if not exists idx_chapters on chapters(ItemId, ChapterIndex)",
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//pragmas
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"pragma temp_store = memory",
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"pragma shrink_memory"
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};
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_connection.RunQueries(queries, _logger);
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PrepareStatements();
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}
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/// <summary>
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/// The _write lock
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/// </summary>
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private readonly SemaphoreSlim _writeLock = new SemaphoreSlim(1, 1);
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/// <summary>
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/// Prepares the statements.
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/// </summary>
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private void PrepareStatements()
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{
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_deleteChaptersCommand = _connection.CreateCommand();
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_deleteChaptersCommand.CommandText = "delete from chapters where ItemId=@ItemId";
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_deleteChaptersCommand.Parameters.Add(_deleteChaptersCommand, "@ItemId");
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_saveChapterCommand = _connection.CreateCommand();
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_saveChapterCommand.CommandText = "replace into chapters (ItemId, ChapterIndex, StartPositionTicks, Name, ImagePath) values (@ItemId, @ChapterIndex, @StartPositionTicks, @Name, @ImagePath)";
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_saveChapterCommand.Parameters.Add(_saveChapterCommand, "@ItemId");
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_saveChapterCommand.Parameters.Add(_saveChapterCommand, "@ChapterIndex");
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_saveChapterCommand.Parameters.Add(_saveChapterCommand, "@StartPositionTicks");
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_saveChapterCommand.Parameters.Add(_saveChapterCommand, "@Name");
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_saveChapterCommand.Parameters.Add(_saveChapterCommand, "@ImagePath");
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}
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/// <summary>
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/// Gets chapters for an item
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/// </summary>
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/// <param name="id">The id.</param>
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/// <returns>IEnumerable{ChapterInfo}.</returns>
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/// <exception cref="System.ArgumentNullException">id</exception>
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public IEnumerable<ChapterInfo> GetChapters(Guid id)
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{
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if (id == Guid.Empty)
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{
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throw new ArgumentNullException("id");
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}
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using (var cmd = _connection.CreateCommand())
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{
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cmd.CommandText = "select StartPositionTicks,Name,ImagePath from Chapters where ItemId = @ItemId order by ChapterIndex asc";
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cmd.Parameters.Add(cmd, "@ItemId", DbType.Guid).Value = id;
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using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult))
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{
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while (reader.Read())
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{
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yield return GetChapter(reader);
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}
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}
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}
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}
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/// <summary>
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/// Gets a single chapter for an item
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/// </summary>
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/// <param name="id">The id.</param>
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/// <param name="index">The index.</param>
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/// <returns>ChapterInfo.</returns>
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/// <exception cref="System.ArgumentNullException">id</exception>
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public ChapterInfo GetChapter(Guid id, int index)
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{
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if (id == Guid.Empty)
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{
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throw new ArgumentNullException("id");
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}
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using (var cmd = _connection.CreateCommand())
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{
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cmd.CommandText = "select StartPositionTicks,Name,ImagePath from Chapters where ItemId = @ItemId and ChapterIndex=@ChapterIndex";
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cmd.Parameters.Add(cmd, "@ItemId", DbType.Guid).Value = id;
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cmd.Parameters.Add(cmd, "@ChapterIndex", DbType.Int32).Value = index;
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using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult | CommandBehavior.SingleRow))
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{
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if (reader.Read())
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{
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return GetChapter(reader);
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}
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}
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return null;
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}
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}
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/// <summary>
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/// Gets the chapter.
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/// </summary>
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/// <param name="reader">The reader.</param>
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/// <returns>ChapterInfo.</returns>
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private ChapterInfo GetChapter(IDataReader reader)
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{
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var chapter = new ChapterInfo
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{
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StartPositionTicks = reader.GetInt64(0)
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};
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if (!reader.IsDBNull(1))
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{
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chapter.Name = reader.GetString(1);
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}
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if (!reader.IsDBNull(2))
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{
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chapter.ImagePath = reader.GetString(2);
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}
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return chapter;
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}
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/// <summary>
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/// Saves the chapters.
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/// </summary>
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/// <param name="id">The id.</param>
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/// <param name="chapters">The chapters.</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <returns>Task.</returns>
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/// <exception cref="System.ArgumentNullException">
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/// id
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/// or
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/// chapters
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/// or
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/// cancellationToken
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/// </exception>
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public async Task SaveChapters(Guid id, IEnumerable<ChapterInfo> chapters, CancellationToken cancellationToken)
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{
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if (id == Guid.Empty)
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{
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throw new ArgumentNullException("id");
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}
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if (chapters == null)
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{
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throw new ArgumentNullException("chapters");
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}
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cancellationToken.ThrowIfCancellationRequested();
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await _writeLock.WaitAsync(cancellationToken).ConfigureAwait(false);
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IDbTransaction transaction = null;
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try
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{
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transaction = _connection.BeginTransaction();
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// First delete chapters
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_deleteChaptersCommand.GetParameter(0).Value = id;
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_deleteChaptersCommand.Transaction = transaction;
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_deleteChaptersCommand.ExecuteNonQuery();
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var index = 0;
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foreach (var chapter in chapters)
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{
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cancellationToken.ThrowIfCancellationRequested();
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_saveChapterCommand.GetParameter(0).Value = id;
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_saveChapterCommand.GetParameter(1).Value = index;
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_saveChapterCommand.GetParameter(2).Value = chapter.StartPositionTicks;
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_saveChapterCommand.GetParameter(3).Value = chapter.Name;
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_saveChapterCommand.GetParameter(4).Value = chapter.ImagePath;
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_saveChapterCommand.Transaction = transaction;
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_saveChapterCommand.ExecuteNonQuery();
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index++;
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}
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transaction.Commit();
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}
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catch (OperationCanceledException)
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{
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if (transaction != null)
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{
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transaction.Rollback();
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}
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throw;
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}
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catch (Exception e)
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{
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_logger.ErrorException("Failed to save chapters:", e);
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if (transaction != null)
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{
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transaction.Rollback();
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}
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throw;
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}
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finally
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{
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if (transaction != null)
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{
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transaction.Dispose();
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}
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_writeLock.Release();
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}
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}
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/// <summary>
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/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
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/// </summary>
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public void Dispose()
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{
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Dispose(true);
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GC.SuppressFinalize(this);
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}
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private readonly object _disposeLock = new object();
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/// <summary>
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/// Releases unmanaged and - optionally - managed resources.
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/// </summary>
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/// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
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protected virtual void Dispose(bool dispose)
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{
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if (dispose)
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{
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try
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{
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lock (_disposeLock)
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{
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if (_connection != null)
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{
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if (_connection.IsOpen())
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{
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_connection.Close();
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}
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_connection.Dispose();
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_connection = null;
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}
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}
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}
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catch (Exception ex)
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{
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_logger.ErrorException("Error disposing database", ex);
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}
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}
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}
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}
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}
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